坚定不移的；不屈不挠的；一心一意的；专心致志的；
3. 七彩网·英语单词大全
adj
1. marked by firm determination or resolution
not shakable
e.g. firm convictions
a firm mouth
steadfast resolve
a man of unbendable perseverence
unwavering loyalty
Synonym: firmsteadfaststeadystiffunfalteringunshakableunwavering